When he’s on the road, Del Smith’s home is his blue-and-silver 18-wheeler. The tidy cab has everything that Smith, who is a slight mustachioed man, needs for a long haul: a fridge for his iced tea, a bunk made with a blanket decorated with cowboy boots, a first-aid kit. In his 62 years of life, Smith’s survived near-death experiences riding rodeo, flying helicopters in Vietnam and, most recently, an industrial accident in Texas. He never thought his next brush with death would take place right here in his truck, after buying a cantaloupe in July from a Byron, Ill., farm stand.